From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Dmitri Paduchikh Newsgroups: gmane.emacs.bugs Subject: bug#25365: 25.1; Coding system for bookmarks and desktop Date: Tue, 10 Jan 2017 01:34:18 +0500 Message-ID: <87tw98x99x.fsf@gmail.com> References: <87mvf57kdx.fsf@gmail.com> <83pojzavhg.fsf@gnu.org> <87d1fxzy9d.fsf@gmail.com> <83k2a5blo9.fsf@gnu.org> <874m18yxei.fsf@gmail.com> <83eg0cdq68.fsf@gnu.org> NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: blaine.gmane.org 1483994130 17700 195.159.176.226 (9 Jan 2017 20:35:30 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Mon, 9 Jan 2017 20:35:30 +0000 (UTC) User-Agent: Gnus/5.13 (Gnus v5.13) Cc: 25365@debbugs.gnu.org To: Eli Zaretskii Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Mon Jan 09 21:35:26 2017 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1cQgeu-0002UK-2F for geb-bug-gnu-emacs@m.gmane.org; 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Mon, 09 Jan 2017 12:34:21 -0800 (PST) Original-Received: from gmail.com ([46.48.49.226]) by smtp.gmail.com with ESMTPSA id b76sm21443720lfg.41.2017.01.09.12.34.19 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Mon, 09 Jan 2017 12:34:19 -0800 (PST) In-Reply-To: <83eg0cdq68.fsf@gnu.org> (Eli Zaretskii's message of "Mon, 09 Jan 2017 20:49:35 +0200") X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 208.118.235.43 X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Original-Sender: "bug-gnu-emacs" Xref: news.gmane.org gmane.emacs.bugs:127940 Archived-At: Eli Zaretskii wrote: >> From: Dmitri Paduchikh >> Cc: 25365@debbugs.gnu.org >> Date: Mon, 09 Jan 2017 22:07:49 +0500 >> >> It may be hard to know what is happening if it is designed to happen >> automatically. So, if you insist on supporting user choice here, please >> consider the following patch. It adds the check of workability of the chosen >> codec unless it is given directly by user in which case the usual procedure >> applies, or the codec is omnipotent. In the case of encodability problems it >> will fallback to utf-8-emacs. EZ> With the proposed patch, the fallback utf-8-emacs will happen EZ> silently, so the user will have no idea that her selected encoding was EZ> ignored, isn't it so? If so, I don't think it's a good idea to do EZ> that, when the user explicitly asks for a particular encoding. It is a choice between data loss (see below) and using another encoding. The former seems worse to me. EZ> Come to think of that, I actually don't understand why anything is EZ> needed in addition to the current code: if the user-chosen encoding EZ> cannot safely encode the bookmark file, Emacs will refuse to save the EZ> file, and will insist on the user providing a safe encoding. Only when user is specifying encoding through C-x RET c right now. Next time, when the encoding is chosen automatically this check won't be done. Try the following experiment: mark some non-ASCII character and evaluate this form by M-:. (let ((coding-system-for-write 'us-ascii)) (shell-command-on-region (region-beginning) (region-end) "od -A n -t x1")) The output is " 3f". I guess that exact choice of a replacement character depends on the coding system. EZ> E.g., set a bookmark in TUTORIAL.ru, and then try saving the EZ> bookmark file using the Latin-1 encoding. I just tried something EZ> like that, and the effect was exactly as I expected: Emacs requested EZ> me to provide another encoding. Try this in different order. Assuming your patch applied, save bookmarks using latin-1. Suppose this operation passes successfully and bookmarks have been saved using latin-1. Then bookmark TUTORIAL.ru and save again not specifying encoding. With best regards Dmitri Paduchikh